EP 1681633 A3 20100609 - Quantified boolean formula (QBF) solver
Title (en)
Quantified boolean formula (QBF) solver
Title (de)
Lösungsprogramm für Quantifizierte Boolesche Formel (QBF)
Title (fr)
Résolveur de formule booléenne quantifiée (QBF)
Publication
Application
Priority
US 3895805 A 20050118
Abstract (en)
[origin: EP1681633A2] Quantified Boolean formula (QBF) techniques are used in determining QBF satisfiability. A QBF is broken into component parts that are analyzable by a satisfiability (SAT) solver. Each component is then independently, and perhaps in parallel, analyzed for satisfiability. If a component is unsatisfiable, then it is determined that the QBF is unsatisfiable, and the analysis is stopped. If a component is satisfiable, then an assignment corresponding to the satisfiable component is noted. If a component is satisfiable, then it is appended to another untested component to provide a combination component, and the satisfiability of the combination component is analyzed. Such appending and analysis is repeated until the QBF is completed and determined to be satisfiable or determined to be unsatisfiable.
IPC 8 full level
G06F 17/11 (2006.01)
CPC (source: EP US)
G06F 17/11 (2013.01 - EP US); G06F 30/3323 (2020.01 - EP US)
Citation (search report)
- [A] US 6131078 A 20001010 - PLAISTED DAVID A [US]
- [A] BIERE A: "Resolve and expand", THE SEVENTH INTERNATIONAL CONFERENCE ON THEORY AND APPLICATIONS OF SATISFIABILITY TESTING (SAT 2004), 10-13 MAY 2004, VANCOUVER, BC, CANADA, May 2004 (2004-05-01), XP002580245, Retrieved from the Internet <URL:http://www.satisfiability.org/SAT04/programme/93.pdf> [retrieved on 20100428]
- [A] AYARI A ET AL: "QUBOS: Deciding quantified boolean logic using propositional satisfiability solvers", FORMAL METHODS IN COMPUTER-AIDED DESIGN, LECTURE NOTES IN COMPUTER SCIENCE VOL. 2517, 2002, pages 187 - 201, XP002580246
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR
Designated extension state (EPC)
AL BA HR MK YU
DOCDB simple family (publication)
EP 1681633 A2 20060719; EP 1681633 A3 20100609; JP 2006202288 A 20060803; US 2006190865 A1 20060824; US 7249333 B2 20070724
DOCDB simple family (application)
EP 05112489 A 20051220; JP 2006009051 A 20060117; US 3895805 A 20050118